Needle bar assembly for warp knitting machines



July 15, 1952 H. c. NOE Re. 23,521

NEEDLE BAR ASSEMBLY FOR WARP KNITTING MACHINES Original Filed July 19, 1947 14 Jllllllll.v LE

INVENTOR. Z f$ 6/1 58 BY ATTORNEY Reissued July 15, 1952 v Re. 23,521

1 23,521 M V NEEDLE BAR ASSEMBLY FOR WARP KNITTING MACHINES Harold C. Noe, Upper Montclai'ryN. Jgassignor to Kidde Manufacturing Co., 'Inc., Bloomfield, N. J a corporation oi Delaware OriginalNo. 2,562,939, datedAugust 7. 1951, Se-

rial No. 762,017, July 19, 1947. Application for reissue October 9, 1951, Serial No. 250,408

UNITED STATES PATENT "2013111115. (Cl. 66-114) Matter enclosed] in heavy brackets I: appears in the original patent but forms no part of this reissue specification; matter printed in italics indicates the additions made by reissue.

I The present invention relates to knitting machines, and more particularly to the needle assembly of warp knitting machines.

The present invention is concerned with knitting machines having a needle bar on which are secured a plurality of needle blocks supporting the needles. 7

.One of .the difficulties heretofore encountered with machines of thistype was that the bolts or screws utilized to secure the blocks to the bar retained the blocks against slight shifting primarily by friction. During the knitting operation, when the needles were subjected to severe forces which in turn were transmitted to the blocks, the resulting force acting thereon tended to overcome the force of friction holding the blocks in position on thebar. Due to the fact that the blocks were formed of some relatively soft material, such'as lead, shifting thereof caused the bolts or screws to enlarge the holes in the blocks through which they extended, thus eventually permitting the blocks to be shifted a sufficient distance to place the needles out of alignment. This necessitated frequent shut down of the ma-.- chine and the tedious operation of readjusting the blocks to align the needles.

The present invention aims to overcome the foregoing difliculties and disadvantages by pro viding a. needle assembly which is simple in construction, economical to manufacture, and reliable in operation.

Accordingly, an object of the present invention is to provide means for mounting the needle blocks in a predetermined position with respect to the needle bar to thereby align the needles in a simple expedient manner.

Another object is to lock the needle blocks in position to prevent shifting thereof When subjected to severe forces during operation of the machine.

Another object is to facilitate assembling the needle blocks on the needle bar.

A further object consists of the arrangement of parts and the construction of elements whereby the foregoing objects are accomplished.

scription, and is shown in the accompanying drawing, forming a part of the specification,

wherein: Figure 1 isa being removed, illustrating the present invention.

Figure 2 is a sectional view taken along the'li'ne 22 on Figure 1. I v

Figure 3 is a rear elevational view of a needle block. 1

Referring to the drawing in detail, there is shown, in Figure l, a portion of aneedle bar ill which may be associated with a warp knitting machine or the like, and a plurality of needle blocks ll mounted side by side on the barlll. The bar maybe-of any desired length depending upon the Width of the warp and any desired number of blocks-may be utilized, three blocks being shown by way of example to illustrate the present invention.

The needle'bar [0 has a lengthwise extendin groove or recess l2 formed therein just below the upper edge thereof and has a plurality of spaced threaded apertures [4 each adapted for receiving means for securing one of the needle blocks II as will be described hereinafter.

As shown in Figures 2 and 3, the needle blocks ll each have an upper section 15 in which the shanks of the needles [6 are embedded, a lower section ll of reduced thickness adapted to engage the front of the needle bar, and a shoulder l9 adapted to overlie the upper edge of the bar. The rear surface of the blocks engaging the front of the bar has a. lengthwise extending projection, rib, tongue or head 20 extending into and cooperating with the groove l2 to mount and retain the block in a predetermined position with respect to the bar. An aperture 2| is provided in the blocks below the rib 20 adapted to register with an aperture [4 of the bar when the blocks are positioned thereon.

The blocks l l are each adapted to be removably secured to the bar Ill by a screw 22 extending through the aperture 2| in the blocks and threaded into an aperture M of the bar. The screws may be of the type having a wrench receiving invention has fragmentary front elevational view of a needle bar and needle blocks, one block 3 recess 21 in the head thereof. A lock washer 25 cent said surface, a e] block member havmay be disposed between the head and the front ing a shoulder surface adapted to be positioned of the block. adjacent said edge surface and having an aper- In assembling the needle blocks, the blocks are tule extending t sversely therethrou h adjapositioned against the bar with the ribs 20 seated 5 cent said shoulder surface adapted to register in the groove z The Screws 22 are then applied with said [needle] bar member aperture, one of to secure the, blocks onthe bar. 7 By reason, of i me b r hav n an e nga ed ere n bee t ldekiner'ib ancle'roove a n ementi ei wee its i fi 'a d?$ i i% and blocks are retained in their desired position, and; the Othr of saia'membr having an elongajte when subjected to severe forces during the knit- 5P thereon F? Its aperture and 1115 ting operation, any tendency to shit ispmvqnteqf said surface for receiving sa1d r1b, and means e1;- This prevents the screws 22 from enlarging the" -Fl through'sald apertures F Secunng Sam apertures 2| and subsequent improper positioning" Eneegle] 9 member to Sam [needle] bar of the blocks with respect to, theebar, thereby F k I ,l d1

eliminating the necessity of frequentiadjustmentn a! I Pm 1 3 machme, a [1186 bar havof the blocks ing a freejedge a threaded aperture extending While the presentinvention hasheen dgsqribedfi I transversely therethrougll adJacent said edge, and illustrated by way of examplewith tlie'g'rdove; i gngthwilg ,e f j narrow groove 9 l2 m the bar and the rib oh the? blocks, it'will F ?helelflbetween i aperture and i be understood that the bar could be provided gage; [.needlel block having Shoulder p051- with a rib and the blocks with a groove: I II v tioned adJ acent said edge, an aperture extending .Erom the foregoing description. itwill be seen- ,u tramway-$1615, pherettlrougyhfiqjaqqnt said ttIHeIprIsnt ifinvefitionipmvmfijafi-immqvgdj deradaptedto register --with said-[needle] bar needle block and needle bar assembly which is' simple in construction and can be manufactured o one d between metmongd without any material increase in manufacturi aperture and said shoulder pos1t1oned in sa d interlockingelements:amlmggedfnm. groove,.e1and a screw: extending through .sald

T aperture; and a lengthwise extending narrow: rib.

construction and readily, withstand such [needle] block aperture and threadedly securedv h th m v in said [needle] barv aperture to secure said W .9 U By 1 t i e .6 3O [needlelblock to said. [need1e]-bar. e I 1 5 n HAROLD NQ s iris'v ari'oL i's,ch t l es may be made in the re co'nstructionand arrangement of the parts here-' I I i n without departing from the spirit and scope REFERENCES CITED th m t a d it ut Sacrificing any of --'1he following references are of record inv the itsfadvantages ,-it; is; to be understood that-all file of -this patent or the-original patentf at r. her in i to b n r d a illustrai UNITED STATES PATENTS tlve and not in any limitingsense. I I

It is also to be understood that the following Number I I a Data claims are intended to cover all the generic and 45-65555 (19111191911 Jane-5., .39. specific features of the invention herein a 40 I-793 556 Wrlsonet June 2' !v .9Q scribed-rand all statementsof the "scope of the 334 5 3 .-W I. I G 3 905. invention which, as a matter of language, might E fe NOVI i922; besaid to fall thereb'etween.'- I 2413588 5.1mm A r- 93 I m; 1 I e v H 22%7303 leebe kneeh e 4J n rl il 1. A [needle] bar assembly-for warp knitting 39 AI QQ SQE S nt 2,, I machines comprisingya [needle] barmember 1 5? Morton QQE. 21 v hV-ihQ'i free ed e surface and havinganapere 239E894 P i l -el 84- eeture extendingtransversely therethrough adja- I 

